April 29, 2016 - ENGLAND - A terrifying video has captured the moment a plane near Heathrow was struck by lightning as the sky flashed blood red.

Passengers on the flight into London were left shocked after their plane got caught up in the thunderstorm.

The clip also shows just how loud the thunder was, which rumbles just moments after the flash in the sky.

At least three planes are thought to have been struck.

A British Airways pilot guided a flight into Heathrow safely after it was hit, and holidaymakers returning from Iceland on an Icelandair flight spoke of a "huge crack" as lightning hit the wing of their plane.

She told the Evening Standard: "It came out of the blue. There was a really loud bang and white flash - not really what you want on a plane.

"We could see the flash but it was on the opposite side of the plane to me. The lightning hit the wing."

Her husband, Adam Smith, described hearing a "huge 'crack' sound" before a flash of light and sparks on the right of the plane.

WATCH: Lightning engulfs Heathrow-bound plane.

Catherine Mayer, co-founder of the Women's Equality Party and who was also returning from Iceland, said: "The plane got hit by lightning. Big flash and bang. So happy we landed safely."British Airways said its flight BA857 from Prague was also hit by lightning as it descended into Heathrow.

The airline said: "The flight landed safely and will undergo inspection before it returns to service. The safety of our customers and crew is always our top priority.

"Lightning strikes are fairly common and aircraft are designed to cope with them." - Mirror.